Study of the effect of segmentation on the broadband characteristics of a piezoceramic element

Within the framework of the presented study, an experimental analysis of the electrical characteristics of a segmented piezoceramic element made of the material CTBS-3 with a nominal resonant frequency of 80 kHz has been carried out. The segmentation of the element, performed by means of precision engraving, consisted in dividing the basic structure into five separate segments. The main objective of the study was to extend the bandwidth of the piezo element compared to the non-segmented configuration, which is a relevant task in the field of acoustoelectronics. Measurements of the complex impedance, active component of the total resistance and dynamic capacitance of both individual segments and their various combinations, as well as of the whole element in two states were carried out: in the unloaded state (without filling) and loaded after filling with compound material. The purpose of the study was to determine the effectiveness of segmentation in achieving the desired broadband, as well as a detailed study of the influence of the segmentation process and subsequent casting on the electrical parameters of the piezo element. Particular attention was paid to the identification of interrelationships and mutual influence between the individual segments of the piezo element, allowing to evaluate their dynamic interaction and electromechanical properties under different operating conditions. The obtained data are intended for the development and optimisation of the design of piezoelectric transducers intended for operation in broadband systems, including the development of techniques for controlling the characteristics of individual segments to achieve target parameters.

Authors: V. I. Kalyuta, V. V. Demenchuk, P. P. Pivnev, S. P. Tarasov

Direction: Physics

Keywords: CTSB-3 piezoceramics, segmented piezoelement, broadband, resonant frequency, impedance, capacitance

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